On peculiarities of quasar red-shifts and hypotheses to explain them /
[by] A. Kipper. Pressure in inhomogeneous world models / [by] E. Saar.
- Eesti NSV Teaduste Akadeemia, W. Struve Nimeline Tartu Astrofüüsika Observatoorium, 1971.
- 58 p. : ill. ; 20 cm.